The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Module documentation pages (10 members)
- Modules for general use (1 member)
- Modules for image handling (1 member)
- Modules handling colors (1 member)
- Modules that add a tracking category (12 members)
- Modules that check for strip markers (3 members)
- Modules that create a short description (1 member)
- Modules using tabular data (1 member)
- Mountain templates (1 member)
- Multi-column templates (5 members)
- Namespace manipulation templates (1 member)
- Navbox meta-templates (2 members)
- Navboxes using background colours (2 members)
- Navigational boxes without horizontal lists (2 members)
- Nordstettener Eisenbahngesellschaft (3 members)
- Organization infobox templates (1 member)
- Pages using DynamicPageList3 parser function (7 members)
- Pages using Tabber parser tag (1 member)
- Pages using deprecated source tags (10 members)
- Pages using div col with small parameter (1 member)
- Pages using duplicate arguments in template calls (3 members)
- Pages using infobox settlement with missing country (2 members)
- Pages using infobox settlement with no coordinates (1 member)
- Pages using infobox settlement with no map (4 members)
- Pages using infobox station with unknown parameters (3 members)
- Pages using infobox street with Paris-specific parameters (2 members)
- Pages using infobox templates with ignored data cells (2 members)
- Pages using navbox columns without the first column (1 member)
- Pages using xtag template with unsupported tag name (1 member)
- Pages with TemplateStyles errors (2 members)
- Pages with broken file links (6 members)
- Pages with no gauge entered in Infobox rail line (3 members)
- Pages with no open date in Infobox station (1 member)
- Pages with script errors (67 members)
- Pages with short description (17 members)
- Parameter selection templates (1 member)
- Place infobox templates (1 member)
- Political party infobox templates (1 member)
- Programming typing-aid templates (1 member)
- Proposals (1 member)
- Public Farms (1 member)
- Public transit (5 members)
- Public transit operators (1 member)
- Rail modules (2 members)
- Rail routemap templates (2 members)
- Rail transport infobox templates (5 members)
- Rail transport succession modules (1 member)
- Rail transport templates (1 member)
- Railway station infobox templates (1 member)
- Redirect formatting templates (1 member)